/Engine/Source/Runtime/Slate/Public/Widgets/Input/SEditableTextBox.h
Sets the text color and opacity when this box has keyboard focus(overrides Style)
void SetFocusedForegroundColor ( const [TAttribute](API\Runtime\Core\Misc\TAttribute)< [FSlateColor](API\Runtime\SlateCore\Styling\FSlateColor) > & InFocusedForegroundColor )